CHEMICAL MEANS FOR EXTINGUISHING FIRES; PROCESSES FOR MAKING HARMFUL CHEMICAL SUBSTANCES HARMLESS, OR LESS HARMFUL, BY EFFECTING A CHEMICAL CHANGE; COMPOSITION OF MATERIALS FOR COVERINGS OR CLOTHING FOR PROTECTING AGAINST HARMFUL CHEMICAL AGENTS; COMPOSITION OF MATERIALS FOR TRANSPARENT PARTS OF GAS-MASKS, RESPIRATORS, BREATHING BAGS OR HELMETS; COMPOSITION OF CHEMICAL MATERIALS FOR USE IN BREATHING APPARATUS
A62D
Note(s)
Processes using enzymes or micro-organisms in order to:
liberate, separate or purify a pre-existing compound or composition, or to
treat textiles or clean solid surfaces of materials
Processes for making harmful chemical substances harmless, or less harmful, by effecting a chemical change in the substances (consuming noxious gases by combustion Fulltext... Hierarchy... Expanded...F23G 7/06) [1,]
A62D 3/00
Note(s)
This group does not cover:
chemical or physico-chemical type processes where eradicating or diminishing the dangerousness of harmful chemical substances produces useful products (e.g. cement). These types of processes are covered by the appropriate subclass for making the specific product. However, in situations where processes for making products include a subset of process steps with eradicating or diminishing the dangerousness of a harmful chemical substance as its fundamental goal, and this subset is in itself novel and unobvious, this subset is covered by group Fulltext... Hierarchy... Expanded...A62D 3/00. []
In this group the following term is used with the meaning indicated:
“harmful chemical substances” are chemical waste substances which are too hazardous or toxic to be discarded in an ordinary municipal landfill. []
In this group, at each hierarchical level, in the absence of an indication to the contrary, classification is made in the first appropriate place. []
by biological methods, i.e. processes using enzymes or micro-organisms []
A62D 3/10
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by subjecting to electric or wave energy or particle or ionizing radiation []
A62D 3/11
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Electrochemical processes, e.g. electrodialysis []
A62D 3/115
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Electrolytic degradation or conversion []
A62D 3/13
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to sonic energy []
A62D 3/15
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to particle radiation, e.g. electron beam radiation []
A62D 3/17
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to electromagnetic radiation, e.g. emitted by a laser []
A62D 3/172
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Gamma rays, i.e. radiation having a wavelength of about 0.003 to 0.03 nm []
A62D 3/174
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X-rays, i.e. radiation having a wavelength of about 0.03 to 3 nm []
A62D 3/176
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Ultraviolet radiation, i.e. radiation having a wavelength of about 3 to 400 nm []
A62D 3/178
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Microwave radiation, i.e. radiation having a wavelength of about 0.3 to 30 cm []
A62D 3/19
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to plasma []
A62D 3/20
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by hydropyrolysis or destructive steam gasification, e.g. using water and heat to effect chemical change []
A62D 3/30
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by reacting with chemical agents []
A62D 3/32
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by treatment in molten chemical reagent, e.g. salts or metals []
A62D 3/33
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by chemically fixing the harmful substance, e.g. by chelation or complexation []
A62D 3/34
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Dehalogenation using reactive chemical agents able to degrade []
A62D 3/35
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by hydrolysis []
A62D 3/36
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Detoxification by using acid or alkaline reagents []
A62D 3/37
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by reduction, e.g. hydrogenation []
A62D 3/38
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by oxidation; by combustion []
A62D 3/40
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by heating to effect chemical change, e.g. by pyrolysis []
P:30
A62D 5/00
Composition of materials for coverings or clothing affording protection against harmful chemical agents
P:40
A62D 7/00
Composition of materials for transparent parts of gas-masks, respirators, breathing bags, or helmets
A62D 7/02
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Clear-view sheets which prevent the formation of water drops or ice (materials for minimising adherence of ice or water to surfaces Fulltext... Hierarchy... Expanded...C09K 3/18)